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AT89LP3240-20PU
Microchip Technology
IC MCU 8BIT 32KB FLASH 40DIP
1739 Pcs New Original In Stock
8051 89LP Microcontroller IC 8-Bit 20MHz 32KB (32K x 8) FLASH 40-PDIP
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5.0 / 5.0
- (450 Ratings)
AT89LP3240-20PU
Product Overview
1241886
DiGi Electronics Part Number
AT89LP3240-20PU-DGManufacturer
Microchip Technology
AT89LP3240-20PU
Description
IC MCU 8BIT 32KB FLASH 40DIPInventory
1739 Pcs New Original In Stock
8051 89LP Microcontroller IC 8-Bit 20MHz 32KB (32K x 8) FLASH 40-PDIP
Quantity
Minimum 1
Minimum 1
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AT89LP3240-20PU Technical Specifications
Category
Embedded, Microcontrollers
Packaging
-
Series
89LP
Product Status
Obsolete
DiGi-Electronics Programmable
Not Verified
Core Processor
8051
Core Size
8-Bit
Speed
20MHz
Connectivity
I2C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number of I/O
38
Program Memory Size
32KB (32K x 8)
Program Memory Type
FLASH
EEPROM Size
8K x 8
RAM Size
4.25K x 8
Voltage - Supply (Vcc/Vdd)
2.4V ~ 3.6V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C (TA)
Mounting Type
Through Hole
Supplier Device Package
40-PDIP
Package / Case
40-DIP (0.600", 15.24mm)
Base Product Number
AT89LP3240
Datasheet & Documents
HTML Datasheet
AT89LP3240-20PU-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
Not Applicable
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.31.0001
Additional Information
Other Names
1611-AT89LP3240-20PU
1611-AT89LP3240-20PU-DG
AT89LP324020PU
1611-AT89LP3240-20PUINACTIVE
Standard Package
10
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
The experience on their platform is consistently top-notch and economical.
de desembre 02, 2025
I was amazed by how quickly my package arrived, thanks to their efficient logistics network.
de desembre 02, 2025
The safety of the packaging gave me confidence in their service quality.
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Frequently Asked Questions (FAQ)
What are the key design-in risks when integrating the AT89LP3240-20PU into a new embedded system given its obsolete status?
Using the AT89LP3240-20PU in a new design carries significant supply chain risks due to its obsolete status. While current inventory exists, long-term availability is not guaranteed, which can disrupt production and increase lifecycle management costs. For mission-critical or high-volume applications, consider redesigning with active-pin-compatible alternatives like the AT89LP2051 or migrating to Microchip's newer AVR or PIC MCUs with enhanced support. If proceeding, secure extended stock and validate second-source options to mitigate obsolescence-related downtime.
How does the 8KB EEPROM in the AT89LP3240-20PU compare to external I2C EEPROMs in terms of endurance and data retention for industrial logging applications?
The internal 8KB EEPROM of the AT89LP3240-20PU offers up to 100,000 write/erase cycles and 10-year data retention, suitable for moderate logging use. However, frequent writes from sensors or event counters can exceed endurance limits. For high-write scenarios, offloading logging to external I2C EEPROMs like the 24LC256 (with 1M cycles) is recommended. To preserve the AT89LP3240-20PU's internal EEPROM, implement wear leveling in firmware and use burst writes to minimize access frequency.
Can the AT89LP3240-20PU replace the AT89C5134A-24JC in a USB-to-serial gateway design, and what are the integration challenges?
The AT89LP3240-20PU cannot directly replace the AT89C5134A-24JC in USB-centric designs because it lacks built-in USB 2.0 support, unlike the AT89C5134A-24JC. Designers attempting this substitution would need to implement USB functionality via external transceivers (e.g., FT232RL) over UART, increasing BOM cost and board size. Additionally, clock accuracy and peripheral mapping differences require firmware adaptation. Use the AT89LP3240-20PU only in non-USB applications where UART, SPI, or I2C are sufficient.
What thermal and electrical derating should be applied to the AT89LP3240-20PU when operating at 20MHz in a high-temperature industrial environment near 85°C?
At maximum ambient temperature (85°C), reduce the AT89LP3240-20PU's operating margin by ensuring the voltage supply stays within 2.7V–3.6V to maintain stable 20MHz performance, as lower voltages increase propagation delay. Monitor current draw on I/O lines—limit high-drive outputs to prevent localized heating. Use PCB copper pours for heat dissipation and avoid stacking connectors near the 40-PDIP package. Simulate timing margins under temperature extremes to prevent setup/hold violations in critical control loops.
How reliable is the internal 10-bit ADC in the AT89LP3240-20PU for precision sensing, and what layout practices improve accuracy?
The AT89LP3240-20PU’s internal 8x10-bit ADC is adequate for basic sensing but lacks differential inputs and has ±2 LSB INL, limiting precision. For stable readings, use a dedicated analog ground plane, route AVCC through a low-ESR ferrite bead, and place a 100nF ceramic + 10μF tantalum capacitor close to the AVCC pin. Sample signals at ≤10kHz to minimize noise, and avoid switching digital lines during conversions. For higher accuracy, consider offloading sensing to external sigma-delta ADCs like the ADS1115 with better thermal stability and resolution.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
AT89LP3240-20PU CAD Models
Microchip Technology AT89LP3240-20PU PCB symbols & footprints
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